All the water that flows through the wide pipe in a second must somehow get through a narrow part too which it can do only by going faster.
All the water that flows through the wide pipe in a second must somehow get through a narrow part too which it can do only by going faster.
在一秒钟内流过粗管子的全部水量，一定会以某种方式通过细管子，这只有靠加快流速才能做到。